NMR Study in the Iron-Selenide Rb0.74Fe1.6Se2: Determination of the Superconducting Phase as Iron Vacancy-Free Rb0.3Fe2Se2

Research output: Contribution to journal › Research article › Contributed › peer-review

Contributors

  • Y. Texier - , Université Paris-Saclay (Author)
  • J. Deisenhofer - , Augsburg University (Author)
  • V. Tsurkan - , ASM - Institute of Applied Physics (Author)
  • A. Loidl - , Augsburg University (Author)
  • D. S. Inosov - , Max Planck Institute for Gravitational Physics (Albert Einstein Institute) (Author)
  • G. Friemel - , Max Planck Institute for Gravitational Physics (Albert Einstein Institute) (Author)
  • J. Bobroff - , Université Paris-Saclay (Author)

Abstract

Se-77 and Rb-87 nuclear magnetic resonance (NMR) experiments on Rb-0.Fe-74(1). Se-6(2) reveal clearly distinct spectra originating from a majority antiferromagnetic (AF) and a minority metallic-superconducting (SC) phase. The very narrow NMR line of the SC phase evidences the absence of Fe vacancies and any trace of AF order. The Rb content of the SC phase is deduced from intensity measurements identifying Rb0.3(1)Fe2Se2 as the actual composition of the SC fraction. The resulting estimate of 0.15 electrons/Fe brings this class of superconductors 245 family closer to the other Fe-based superconductor families.

Details

Original languageEnglish
Article number237002
Number of pages5
JournalPhysical review letters
Volume108
Issue number23
Publication statusPublished - 8 Jun 2012
Peer-reviewedYes
Externally publishedYes

External IDs

Scopus 84862169034

Keywords

Keywords

  • KXFE2-YSE2, SEPARATION, ORDER

Library keywords